Ion transport and battery discharge characteristics of polymer electrolyte based on PEO complexed with NaFeF4 salt

Abstract

Ion-conducting solvent-free solid polymer electrolytes based on polyethylene oxide (PEO) complexed with sodium ferric tetrafluoride (NaFeF 4 ) were prepared using a solution casting technique. The complexation of the films was investigated through X-ray diffraction and Fourier transform infrared spectroscopic studies. Measurements of DC conductivity in the temperature range 300-370 K and the transference numbers were carried out to investigate the nature of charge transport in the polymer electrolyte system. Transference number data shows that the charge transport in this system is found to be predominantly due to ions. Using these polymer electrolytes, electrochemical cells were fabricated with the configuration of Na/(PEO+NaFeF 4 )/ (I 2 +C+electrolyte). Various cell parameters, such as open circuit voltage, short circuit current, power density, and energy density of the device were evaluated and reported.

Electrical and optical characterization of (PEO+PVAc) polyblend films

“…The activation energies were evaluated from the slopes of log(σT) vs 1,000/T plots in regions I and II and show a decrease with increasing PVAc concentration. Similar behavior has been reported by other workers [24][25][26].…”

Structural and electrical studies of sodium iodide doped poly(vinyl alcohol) polymer electrolyte films for their application in electrochemical cells

“…They observed that the intensity of XRD pattern of PVA decreases as the amorphous nature increases with the addition of water. No sharp peaks were observed for higher concentrations of NaI salt in the polymer, suggesting the dominant presence of amorphous phase [19]. This amorphous nature results in greater ionic diffusivity with high ionic conductivity, which can be obtained in amorphous polymers that have flexible backbone [20].…”

Structural, Thermal and Optical Properties of Pure and Mn2+ Doped Poly(Vinyl Chloride) Films

“…FTIR spectra of pure doped PVC with that of the pure PVC. The strong broad absorption band appearing in the 2769 -3088 cm -1 region in pure PVC corresponds to symmetric and asymmetric C -H stretching modes of the CH 2 groups 34 . With increasing dopant concentration the width increases and intensity of these bands in PVC is found to decrease.…”